You've already forked UnrealEngineUWP
mirror of
https://github.com/izzy2lost/UnrealEngineUWP.git
synced 2026-03-26 18:15:20 -07:00
1204 lines
40 KiB
C++
1204 lines
40 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
|
|
|
|
#include "DerivedDataCache.h"
|
|
#include "DerivedDataCacheInterface.h"
|
|
|
|
#include "CoreMinimal.h"
|
|
#include "Algo/AllOf.h"
|
|
#include "Misc/CommandLine.h"
|
|
#include "HAL/ThreadSafeCounter.h"
|
|
#include "Misc/ScopeLock.h"
|
|
#include "Stats/StatsMisc.h"
|
|
#include "Stats/Stats.h"
|
|
#include "Async/AsyncWork.h"
|
|
#include "Async/TaskGraphInterfaces.h"
|
|
#include "Serialization/MemoryReader.h"
|
|
#include "Serialization/MemoryWriter.h"
|
|
#include "Modules/ModuleManager.h"
|
|
|
|
#include "DerivedDataBackendInterface.h"
|
|
#include "DerivedDataCachePrivate.h"
|
|
#include "DerivedDataCacheRecord.h"
|
|
#include "DerivedDataPluginInterface.h"
|
|
#include "DDCCleanup.h"
|
|
#include "ProfilingDebugging/CookStats.h"
|
|
|
|
#include "Algo/AllOf.h"
|
|
#include "Algo/Transform.h"
|
|
#include "Misc/CoreMisc.h"
|
|
#include "Misc/ScopeExit.h"
|
|
#include "Misc/StringBuilder.h"
|
|
#include "Misc/CommandLine.h"
|
|
#include "Serialization/CompactBinary.h"
|
|
#include "Serialization/CompactBinaryValidation.h"
|
|
#include "Serialization/CompactBinaryWriter.h"
|
|
|
|
#include <atomic>
|
|
|
|
DEFINE_STAT(STAT_DDC_NumGets);
|
|
DEFINE_STAT(STAT_DDC_NumPuts);
|
|
DEFINE_STAT(STAT_DDC_NumBuilds);
|
|
DEFINE_STAT(STAT_DDC_NumExist);
|
|
DEFINE_STAT(STAT_DDC_SyncGetTime);
|
|
DEFINE_STAT(STAT_DDC_ASyncWaitTime);
|
|
DEFINE_STAT(STAT_DDC_PutTime);
|
|
DEFINE_STAT(STAT_DDC_SyncBuildTime);
|
|
DEFINE_STAT(STAT_DDC_ExistTime);
|
|
|
|
//#define DDC_SCOPE_CYCLE_COUNTER(x) QUICK_SCOPE_CYCLE_COUNTER(STAT_ ## x)
|
|
#define DDC_SCOPE_CYCLE_COUNTER(x) TRACE_CPUPROFILER_EVENT_SCOPE(x);
|
|
|
|
|
|
#if ENABLE_COOK_STATS
|
|
#include "DerivedDataCacheUsageStats.h"
|
|
namespace DerivedDataCacheCookStats
|
|
{
|
|
// Use to prevent potential divide by zero issues
|
|
inline double SafeDivide(const int64 Numerator, const int64 Denominator)
|
|
{
|
|
return Denominator != 0 ? (double)Numerator / (double)Denominator : 0.0;
|
|
}
|
|
|
|
// AddCookStats cannot be a lambda because of false positives in static analysis.
|
|
// See https://developercommunity.visualstudio.com/content/problem/576913/c6244-regression-in-new-lambda-processorpermissive.html
|
|
static void AddCookStats(FCookStatsManager::AddStatFuncRef AddStat)
|
|
{
|
|
TSharedRef<FDerivedDataCacheStatsNode> DDCUsage = GetDerivedDataCacheRef().GatherUsageStats();
|
|
TMap<FString, FDerivedDataCacheUsageStats> DDCStats = DDCUsage->ToLegacyUsageMap();
|
|
{
|
|
const FString StatName(TEXT("DDC.Usage"));
|
|
for (const auto& UsageStatPair : DDCStats)
|
|
{
|
|
UsageStatPair.Value.LogStats(AddStat, StatName, UsageStatPair.Key);
|
|
}
|
|
}
|
|
|
|
// Now lets add some summary data to that applies some crazy knowledge of how we set up our DDC. The goal
|
|
// is to print out the global hit rate, and the hit rate of the local and shared DDC.
|
|
// This is done by adding up the total get/miss calls the root node receives.
|
|
// Then we find the FileSystem nodes that correspond to the local and shared cache using some hacky logic to detect a "network drive".
|
|
// If the DDC graph ever contains more than one local or remote filesystem, this will only find one of them.
|
|
{
|
|
TArray<FString, TInlineAllocator<20>> Keys;
|
|
DDCStats.GenerateKeyArray(Keys);
|
|
FString* RootKey = Keys.FindByPredicate([](const FString& Key) {return Key.StartsWith(TEXT(" 0:")); });
|
|
// look for a Filesystem DDC that doesn't have a UNC path. Ugly, yeah, but we only cook on PC at the moment.
|
|
FString* LocalDDCKey = Keys.FindByPredicate([](const FString& Key) {return Key.Contains(TEXT(": FileSystem.")) && !Key.Contains(TEXT("//")); });
|
|
// look for a UNC path
|
|
FString* SharedDDCKey = Keys.FindByPredicate([](const FString& Key) {return Key.Contains(TEXT(": FileSystem.//")); });
|
|
// look for a Cloud path
|
|
FString* CloudDDCKey = Keys.FindByPredicate([](const FString& Key) {return Key.Contains(TEXT("0: HTTP")); });
|
|
|
|
if (RootKey)
|
|
{
|
|
const FDerivedDataCacheUsageStats& RootStats = DDCStats[*RootKey];
|
|
int64 TotalGetHits =
|
|
RootStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, true) +
|
|
RootStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, false);
|
|
int64 TotalGetMisses =
|
|
RootStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Miss, FCookStats::CallStats::EStatType::Counter, true) +
|
|
RootStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Miss, FCookStats::CallStats::EStatType::Counter, false);
|
|
int64 TotalGets = TotalGetHits + TotalGetMisses;
|
|
|
|
int64 LocalHits = 0;
|
|
if (LocalDDCKey)
|
|
{
|
|
const FDerivedDataCacheUsageStats& LocalDDCStats = DDCStats[*LocalDDCKey];
|
|
LocalHits =
|
|
LocalDDCStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, true) +
|
|
LocalDDCStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, false);
|
|
}
|
|
int64 SharedHits = 0;
|
|
if (SharedDDCKey)
|
|
{
|
|
// The shared DDC is only queried if the local one misses (or there isn't one). So it's hit rate is technically
|
|
const FDerivedDataCacheUsageStats& SharedDDCStats = DDCStats[*SharedDDCKey];
|
|
SharedHits =
|
|
SharedDDCStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, true) +
|
|
SharedDDCStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, false);
|
|
}
|
|
int64 CloudHits = 0;
|
|
if (CloudDDCKey)
|
|
{
|
|
const FDerivedDataCacheUsageStats& CloudDDCStats = DDCStats[*CloudDDCKey];
|
|
CloudHits =
|
|
CloudDDCStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, true) +
|
|
CloudDDCStats.GetStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, false);
|
|
}
|
|
|
|
int64 TotalPutHits =
|
|
RootStats.PutStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, true) +
|
|
RootStats.PutStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Hit, FCookStats::CallStats::EStatType::Counter, false);
|
|
int64 TotalPutMisses =
|
|
RootStats.PutStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Miss, FCookStats::CallStats::EStatType::Counter, true) +
|
|
RootStats.PutStats.GetAccumulatedValue(FCookStats::CallStats::EHitOrMiss::Miss, FCookStats::CallStats::EStatType::Counter, false);
|
|
int64 TotalPuts = TotalPutHits + TotalPutMisses;
|
|
|
|
AddStat(TEXT("DDC.Summary"), FCookStatsManager::CreateKeyValueArray(
|
|
TEXT("BackEnd"), FDerivedDataBackend::Get().GetGraphName(),
|
|
TEXT("HasLocalCache"), LocalDDCKey != nullptr,
|
|
TEXT("HasSharedCache"), SharedDDCKey!=nullptr,
|
|
TEXT("HasCloudCache"), CloudDDCKey !=nullptr,
|
|
TEXT("TotalGetHits"), TotalGetHits,
|
|
TEXT("TotalGets"), TotalGets,
|
|
TEXT("TotalGetHitPct"), SafeDivide(TotalGetHits, TotalGets),
|
|
TEXT("LocalGetHitPct"), SafeDivide(LocalHits, TotalGets),
|
|
TEXT("SharedGetHitPct"), SafeDivide(SharedHits, TotalGets),
|
|
TEXT("CloudGetHitPct"), SafeDivide(CloudHits, TotalGets),
|
|
TEXT("OtherGetHitPct"), SafeDivide((TotalGetHits - LocalHits - SharedHits), TotalGets),
|
|
TEXT("GetMissPct"), SafeDivide(TotalGetMisses, TotalGets),
|
|
TEXT("TotalPutHits"), TotalPutHits,
|
|
TEXT("TotalPuts"), TotalPuts,
|
|
TEXT("TotalPutHitPct"), SafeDivide(TotalPutHits, TotalPuts),
|
|
TEXT("PutMissPct"), SafeDivide(TotalPutMisses, TotalPuts)
|
|
));
|
|
}
|
|
}
|
|
}
|
|
|
|
FCookStatsManager::FAutoRegisterCallback RegisterCookStats(AddCookStats);
|
|
}
|
|
#endif
|
|
|
|
namespace UE
|
|
{
|
|
namespace DerivedData
|
|
{
|
|
|
|
ICache* CreateCache();
|
|
|
|
} // DerivedData
|
|
} // UE
|
|
|
|
/** Whether we want to verify the DDC (pass in -VerifyDDC on the command line)*/
|
|
bool GVerifyDDC = false;
|
|
|
|
/**
|
|
* Implementation of the derived data cache
|
|
* This API is fully threadsafe
|
|
**/
|
|
class FDerivedDataCache : public FDerivedDataCacheInterface
|
|
{
|
|
|
|
/**
|
|
* Async worker that checks the cache backend and if that fails, calls the deriver to build the data and then puts the results to the cache
|
|
**/
|
|
friend class FBuildAsyncWorker;
|
|
class FBuildAsyncWorker : public FNonAbandonableTask
|
|
{
|
|
public:
|
|
enum EWorkerState : uint32
|
|
{
|
|
WorkerStateNone = 0,
|
|
WorkerStateRunning = 1 << 0,
|
|
WorkerStateFinished = 1 << 1,
|
|
WorkerStateDestroyed = 1 << 2,
|
|
};
|
|
|
|
/**
|
|
* Constructor for async task
|
|
* @param InDataDeriver plugin to produce cache key and in the event of a miss, return the data.
|
|
* @param InCacheKey Complete cache key for this data.
|
|
**/
|
|
FBuildAsyncWorker(FDerivedDataPluginInterface* InDataDeriver, const TCHAR* InCacheKey, bool bInSynchronousForStats)
|
|
: bSuccess(false)
|
|
, bSynchronousForStats(bInSynchronousForStats)
|
|
, bDataWasBuilt(false)
|
|
, DataDeriver(InDataDeriver)
|
|
, CacheKey(InCacheKey)
|
|
{
|
|
}
|
|
|
|
virtual ~FBuildAsyncWorker()
|
|
{
|
|
// Record that the task is destroyed and check that it was not running or destroyed previously.
|
|
{
|
|
const uint32 PreviousState = WorkerState.fetch_or(WorkerStateDestroyed, std::memory_order_relaxed);
|
|
checkf(!(PreviousState & WorkerStateRunning), TEXT("Destroying DDC worker that is still running! Key: %s"), *CacheKey);
|
|
checkf(!(PreviousState & WorkerStateDestroyed), TEXT("Destroying DDC worker that has been destroyed previously! Key: %s"), *CacheKey);
|
|
}
|
|
}
|
|
|
|
/** Async worker that checks the cache backend and if that fails, calls the deriver to build the data and then puts the results to the cache **/
|
|
void DoWork()
|
|
{
|
|
// Record that the task is running and check that it was not running, finished, or destroyed previously.
|
|
{
|
|
const uint32 PreviousState = WorkerState.fetch_or(WorkerStateRunning, std::memory_order_relaxed);
|
|
checkf(!(PreviousState & WorkerStateRunning), TEXT("Starting DDC worker that is already running! Key: %s"), *CacheKey);
|
|
checkf(!(PreviousState & WorkerStateFinished), TEXT("Starting DDC worker that is already finished! Key: %s"), *CacheKey);
|
|
checkf(!(PreviousState & WorkerStateDestroyed), TEXT("Starting DDC worker that has been destroyed! Key: %s"), *CacheKey);
|
|
}
|
|
|
|
TRACE_CPUPROFILER_EVENT_SCOPE(DDC_DoWork);
|
|
|
|
const int32 NumBeforeDDC = Data.Num();
|
|
bool bGetResult;
|
|
{
|
|
TRACE_CPUPROFILER_EVENT_SCOPE(DDC_Get);
|
|
|
|
INC_DWORD_STAT(STAT_DDC_NumGets);
|
|
STAT(double ThisTime = 0);
|
|
{
|
|
SCOPE_SECONDS_COUNTER(ThisTime);
|
|
bGetResult = FDerivedDataBackend::Get().GetRoot().GetCachedData(*CacheKey, Data);
|
|
}
|
|
INC_FLOAT_STAT_BY(STAT_DDC_SyncGetTime, bSynchronousForStats ? (float)ThisTime : 0.0f);
|
|
}
|
|
if (bGetResult)
|
|
{
|
|
|
|
if(GVerifyDDC && DataDeriver && DataDeriver->IsDeterministic())
|
|
{
|
|
TArray<uint8> CmpData;
|
|
DataDeriver->Build(CmpData);
|
|
const int32 NumInDDC = Data.Num() - NumBeforeDDC;
|
|
const int32 NumGenerated = CmpData.Num();
|
|
|
|
bool bMatchesInSize = NumGenerated == NumInDDC;
|
|
bool bDifferentMemory = true;
|
|
int32 DifferentOffset = 0;
|
|
if (bMatchesInSize)
|
|
{
|
|
bDifferentMemory = false;
|
|
for (int32 i = 0; i < NumGenerated; i++)
|
|
{
|
|
if (CmpData[i] != Data[i])
|
|
{
|
|
bDifferentMemory = true;
|
|
DifferentOffset = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(!bMatchesInSize || bDifferentMemory)
|
|
{
|
|
FString ErrMsg = FString::Printf(TEXT("There is a mismatch between the DDC data and the generated data for plugin (%s) for asset (%s). BytesInDDC:%d, BytesGenerated:%d, bDifferentMemory:%d, offset:%d"), DataDeriver->GetPluginName(), *DataDeriver->GetDebugContextString(), NumInDDC, NumGenerated, bDifferentMemory, DifferentOffset);
|
|
ensureMsgf(false, TEXT("%s"), *ErrMsg);
|
|
UE_LOG(LogDerivedDataCache, Error, TEXT("%s"), *ErrMsg );
|
|
}
|
|
|
|
}
|
|
|
|
check(Data.Num());
|
|
bSuccess = true;
|
|
delete DataDeriver;
|
|
DataDeriver = NULL;
|
|
}
|
|
else if (DataDeriver)
|
|
{
|
|
{
|
|
TRACE_CPUPROFILER_EVENT_SCOPE(DDC_Build);
|
|
|
|
INC_DWORD_STAT(STAT_DDC_NumBuilds);
|
|
STAT(double ThisTime = 0);
|
|
{
|
|
SCOPE_SECONDS_COUNTER(ThisTime);
|
|
bSuccess = DataDeriver->Build(Data);
|
|
bDataWasBuilt = true;
|
|
}
|
|
INC_FLOAT_STAT_BY(STAT_DDC_SyncBuildTime, bSynchronousForStats ? (float)ThisTime : 0.0f);
|
|
}
|
|
delete DataDeriver;
|
|
DataDeriver = NULL;
|
|
if (bSuccess)
|
|
{
|
|
check(Data.Num());
|
|
|
|
TRACE_CPUPROFILER_EVENT_SCOPE(DDC_Put);
|
|
|
|
INC_DWORD_STAT(STAT_DDC_NumPuts);
|
|
STAT(double ThisTime = 0);
|
|
{
|
|
SCOPE_SECONDS_COUNTER(ThisTime);
|
|
FDerivedDataBackend::Get().GetRoot().PutCachedData(*CacheKey, Data, true);
|
|
}
|
|
INC_FLOAT_STAT_BY(STAT_DDC_PutTime, bSynchronousForStats ? (float)ThisTime : 0.0f);
|
|
}
|
|
}
|
|
if (!bSuccess)
|
|
{
|
|
Data.Empty();
|
|
}
|
|
FDerivedDataBackend::Get().AddToAsyncCompletionCounter(-1);
|
|
|
|
// Record that the task is finished and check that it was running and not finished or destroyed previously.
|
|
{
|
|
const uint32 PreviousState = WorkerState.fetch_xor(WorkerStateRunning | WorkerStateFinished, std::memory_order_relaxed);
|
|
checkf((PreviousState & WorkerStateRunning), TEXT("Finishing DDC worker that was not running! Key: %s"), *CacheKey);
|
|
checkf(!(PreviousState & WorkerStateFinished), TEXT("Finishing DDC worker that is already finished! Key: %s"), *CacheKey);
|
|
checkf(!(PreviousState & WorkerStateDestroyed), TEXT("Finishing DDC worker that has been destroyed! Key: %s"), *CacheKey);
|
|
}
|
|
}
|
|
|
|
FORCEINLINE TStatId GetStatId() const
|
|
{
|
|
RETURN_QUICK_DECLARE_CYCLE_STAT(FBuildAsyncWorker, STATGROUP_ThreadPoolAsyncTasks);
|
|
}
|
|
|
|
std::atomic<uint32> WorkerState{WorkerStateNone};
|
|
/** true in the case of a cache hit, otherwise the result of the deriver build call **/
|
|
bool bSuccess;
|
|
/** true if we should record the timing **/
|
|
bool bSynchronousForStats;
|
|
/** true if we had to build the data */
|
|
bool bDataWasBuilt;
|
|
/** Data dervier we are operating on **/
|
|
FDerivedDataPluginInterface* DataDeriver;
|
|
/** Cache key associated with this build **/
|
|
FString CacheKey;
|
|
/** Data to return to caller, later **/
|
|
TArray<uint8> Data;
|
|
};
|
|
|
|
public:
|
|
|
|
/** Constructor, called once to cereate a singleton **/
|
|
FDerivedDataCache()
|
|
: CurrentHandle(19248) // we will skip some potential handles to catch errors
|
|
, Cache(UE::DerivedData::CreateCache())
|
|
{
|
|
FDerivedDataBackend::Get(); // we need to make sure this starts before we all us to start
|
|
|
|
GVerifyDDC = FParse::Param(FCommandLine::Get(), TEXT("VerifyDDC"));
|
|
|
|
UE_CLOG(GVerifyDDC, LogDerivedDataCache, Display, TEXT("Items retrieved from the DDC will be verified (-VerifyDDC)"));
|
|
}
|
|
|
|
/** Destructor, flushes all sync tasks **/
|
|
~FDerivedDataCache()
|
|
{
|
|
FScopeLock ScopeLock(&SynchronizationObject);
|
|
for (TMap<uint32,FAsyncTask<FBuildAsyncWorker>*>::TIterator It(PendingTasks); It; ++It)
|
|
{
|
|
It.Value()->EnsureCompletion();
|
|
delete It.Value();
|
|
}
|
|
PendingTasks.Empty();
|
|
}
|
|
|
|
virtual UE::DerivedData::ICache& GetCache()
|
|
{
|
|
return *Cache;
|
|
}
|
|
|
|
virtual bool GetSynchronous(FDerivedDataPluginInterface* DataDeriver, TArray<uint8>& OutData, bool* bDataWasBuilt = nullptr) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_GetSynchronous);
|
|
check(DataDeriver);
|
|
FString CacheKey = FDerivedDataCache::BuildCacheKey(DataDeriver);
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("GetSynchronous %s from '%s'"), *CacheKey, *DataDeriver->GetDebugContextString());
|
|
FAsyncTask<FBuildAsyncWorker> PendingTask(DataDeriver, *CacheKey, true);
|
|
AddToAsyncCompletionCounter(1);
|
|
PendingTask.StartSynchronousTask();
|
|
OutData = PendingTask.GetTask().Data;
|
|
if (bDataWasBuilt)
|
|
{
|
|
*bDataWasBuilt = PendingTask.GetTask().bDataWasBuilt;
|
|
}
|
|
return PendingTask.GetTask().bSuccess;
|
|
}
|
|
|
|
virtual uint32 GetAsynchronous(FDerivedDataPluginInterface* DataDeriver) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_GetAsynchronous);
|
|
FScopeLock ScopeLock(&SynchronizationObject);
|
|
const uint32 Handle = NextHandle();
|
|
FString CacheKey = FDerivedDataCache::BuildCacheKey(DataDeriver);
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("GetAsynchronous %s from '%s', Handle %d"), *CacheKey, *DataDeriver->GetDebugContextString(), Handle);
|
|
const bool bSync = !DataDeriver->IsBuildThreadsafe();
|
|
FAsyncTask<FBuildAsyncWorker>* AsyncTask = new FAsyncTask<FBuildAsyncWorker>(DataDeriver, *CacheKey, bSync);
|
|
check(!PendingTasks.Contains(Handle));
|
|
PendingTasks.Add(Handle,AsyncTask);
|
|
AddToAsyncCompletionCounter(1);
|
|
if (!bSync)
|
|
{
|
|
AsyncTask->StartBackgroundTask();
|
|
}
|
|
else
|
|
{
|
|
AsyncTask->StartSynchronousTask();
|
|
}
|
|
// Must return a valid handle
|
|
check(Handle != 0);
|
|
return Handle;
|
|
}
|
|
|
|
virtual bool PollAsynchronousCompletion(uint32 Handle) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_PollAsynchronousCompletion);
|
|
FAsyncTask<FBuildAsyncWorker>* AsyncTask = NULL;
|
|
{
|
|
FScopeLock ScopeLock(&SynchronizationObject);
|
|
AsyncTask = PendingTasks.FindRef(Handle);
|
|
}
|
|
check(AsyncTask);
|
|
return AsyncTask->IsDone();
|
|
}
|
|
|
|
virtual void WaitAsynchronousCompletion(uint32 Handle) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_WaitAsynchronousCompletion);
|
|
STAT(double ThisTime = 0);
|
|
{
|
|
SCOPE_SECONDS_COUNTER(ThisTime);
|
|
FAsyncTask<FBuildAsyncWorker>* AsyncTask = NULL;
|
|
{
|
|
FScopeLock ScopeLock(&SynchronizationObject);
|
|
AsyncTask = PendingTasks.FindRef(Handle);
|
|
}
|
|
check(AsyncTask);
|
|
AsyncTask->EnsureCompletion();
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("WaitAsynchronousCompletion, Handle %d"), Handle);
|
|
}
|
|
INC_FLOAT_STAT_BY(STAT_DDC_ASyncWaitTime,(float)ThisTime);
|
|
}
|
|
|
|
virtual bool GetAsynchronousResults(uint32 Handle, TArray<uint8>& OutData, bool* bOutDataWasBuilt = nullptr) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_GetAsynchronousResults);
|
|
FAsyncTask<FBuildAsyncWorker>* AsyncTask = NULL;
|
|
{
|
|
FScopeLock ScopeLock(&SynchronizationObject);
|
|
PendingTasks.RemoveAndCopyValue(Handle,AsyncTask);
|
|
}
|
|
check(AsyncTask);
|
|
const bool bDataWasBuilt = AsyncTask->GetTask().bDataWasBuilt;
|
|
if (bOutDataWasBuilt)
|
|
{
|
|
*bOutDataWasBuilt = bDataWasBuilt;
|
|
}
|
|
if (!AsyncTask->GetTask().bSuccess)
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("GetAsynchronousResults, bDataWasBuilt: %d, Handle %d, FAILED"), (int32)bDataWasBuilt, Handle);
|
|
delete AsyncTask;
|
|
return false;
|
|
}
|
|
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("GetAsynchronousResults, bDataWasBuilt: %d, Handle %d, SUCCESS"), (int32)bDataWasBuilt, Handle);
|
|
OutData = MoveTemp(AsyncTask->GetTask().Data);
|
|
delete AsyncTask;
|
|
check(OutData.Num());
|
|
return true;
|
|
}
|
|
|
|
virtual bool GetSynchronous(const TCHAR* CacheKey, TArray<uint8>& OutData, FStringView DataContext) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_GetSynchronous_Data);
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("GetSynchronous %s from '%.*s'"), CacheKey, DataContext.Len(), DataContext.GetData());
|
|
ValidateCacheKey(CacheKey);
|
|
FAsyncTask<FBuildAsyncWorker> PendingTask((FDerivedDataPluginInterface*)NULL, CacheKey, true);
|
|
AddToAsyncCompletionCounter(1);
|
|
PendingTask.StartSynchronousTask();
|
|
OutData = PendingTask.GetTask().Data;
|
|
return PendingTask.GetTask().bSuccess;
|
|
}
|
|
|
|
virtual uint32 GetAsynchronous(const TCHAR* CacheKey, FStringView DataContext) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_GetAsynchronous_Handle);
|
|
FScopeLock ScopeLock(&SynchronizationObject);
|
|
const uint32 Handle = NextHandle();
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("GetAsynchronous %s from '%.*s', Handle %d"), CacheKey, DataContext.Len(), DataContext.GetData(), Handle);
|
|
ValidateCacheKey(CacheKey);
|
|
FAsyncTask<FBuildAsyncWorker>* AsyncTask = new FAsyncTask<FBuildAsyncWorker>((FDerivedDataPluginInterface*)NULL, CacheKey, false);
|
|
check(!PendingTasks.Contains(Handle));
|
|
PendingTasks.Add(Handle, AsyncTask);
|
|
AddToAsyncCompletionCounter(1);
|
|
// This request is I/O only, doesn't do any processing, send it to the I/O only thread-pool to avoid wasting worker threads on long I/O waits.
|
|
AsyncTask->StartBackgroundTask(GDDCIOThreadPool);
|
|
return Handle;
|
|
}
|
|
|
|
virtual void Put(const TCHAR* CacheKey, TArrayView<const uint8> Data, FStringView DataContext, bool bPutEvenIfExists = false) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_Put);
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("Put %s from '%.*s'"), CacheKey, DataContext.Len(), DataContext.GetData());
|
|
ValidateCacheKey(CacheKey);
|
|
STAT(double ThisTime = 0);
|
|
{
|
|
SCOPE_SECONDS_COUNTER(ThisTime);
|
|
FDerivedDataBackend::Get().GetRoot().PutCachedData(CacheKey, Data, bPutEvenIfExists);
|
|
}
|
|
INC_FLOAT_STAT_BY(STAT_DDC_PutTime,(float)ThisTime);
|
|
INC_DWORD_STAT(STAT_DDC_NumPuts);
|
|
}
|
|
|
|
virtual void MarkTransient(const TCHAR* CacheKey) override
|
|
{
|
|
ValidateCacheKey(CacheKey);
|
|
FDerivedDataBackend::Get().GetRoot().RemoveCachedData(CacheKey, /*bTransient=*/ true);
|
|
}
|
|
|
|
virtual bool CachedDataProbablyExists(const TCHAR* CacheKey) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_CachedDataProbablyExists);
|
|
ValidateCacheKey(CacheKey);
|
|
bool bResult;
|
|
INC_DWORD_STAT(STAT_DDC_NumExist);
|
|
STAT(double ThisTime = 0);
|
|
{
|
|
SCOPE_SECONDS_COUNTER(ThisTime);
|
|
bResult = FDerivedDataBackend::Get().GetRoot().CachedDataProbablyExists(CacheKey);
|
|
}
|
|
INC_FLOAT_STAT_BY(STAT_DDC_ExistTime, (float)ThisTime);
|
|
return bResult;
|
|
}
|
|
|
|
virtual TBitArray<> CachedDataProbablyExistsBatch(TConstArrayView<FString> CacheKeys) override
|
|
{
|
|
TBitArray<> Result;
|
|
if (CacheKeys.Num() > 1)
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_CachedDataProbablyExistsBatch);
|
|
INC_DWORD_STAT(STAT_DDC_NumExist);
|
|
STAT(double ThisTime = 0);
|
|
{
|
|
SCOPE_SECONDS_COUNTER(ThisTime);
|
|
Result = FDerivedDataBackend::Get().GetRoot().CachedDataProbablyExistsBatch(CacheKeys);
|
|
check(Result.Num() == CacheKeys.Num());
|
|
}
|
|
INC_FLOAT_STAT_BY(STAT_DDC_ExistTime, (float)ThisTime);
|
|
}
|
|
else if (CacheKeys.Num() == 1)
|
|
{
|
|
Result.Add(CachedDataProbablyExists(*CacheKeys[0]));
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
virtual bool AllCachedDataProbablyExists(TConstArrayView<FString> CacheKeys) override
|
|
{
|
|
return CacheKeys.Num() == 0 || CachedDataProbablyExistsBatch(CacheKeys).CountSetBits() == CacheKeys.Num();
|
|
}
|
|
|
|
virtual bool TryToPrefetch(TConstArrayView<FString> CacheKeys, FStringView DebugContext) override
|
|
{
|
|
if (!CacheKeys.IsEmpty())
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_TryToPrefetch);
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("TryToPrefetch %d keys including %s from '%.*s'"),
|
|
CacheKeys.Num(), *CacheKeys[0], DebugContext.Len(), DebugContext.GetData());
|
|
return FDerivedDataBackend::Get().GetRoot().TryToPrefetch(CacheKeys);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void NotifyBootComplete() override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_NotifyBootComplete);
|
|
FDerivedDataBackend::Get().NotifyBootComplete();
|
|
}
|
|
|
|
void AddToAsyncCompletionCounter(int32 Addend) override
|
|
{
|
|
FDerivedDataBackend::Get().AddToAsyncCompletionCounter(Addend);
|
|
}
|
|
|
|
bool AnyAsyncRequestsRemaining() const override
|
|
{
|
|
return FDerivedDataBackend::Get().AnyAsyncRequestsRemaining();
|
|
}
|
|
|
|
void WaitForQuiescence(bool bShutdown) override
|
|
{
|
|
DDC_SCOPE_CYCLE_COUNTER(DDC_WaitForQuiescence);
|
|
FDerivedDataBackend::Get().WaitForQuiescence(bShutdown);
|
|
}
|
|
|
|
/** Get whether a Shared Data Cache is in use */
|
|
virtual bool GetUsingSharedDDC() const override
|
|
{
|
|
return FDerivedDataBackend::Get().GetUsingSharedDDC();
|
|
}
|
|
|
|
virtual const TCHAR* GetGraphName() const override
|
|
{
|
|
return FDerivedDataBackend::Get().GetGraphName();
|
|
}
|
|
|
|
virtual const TCHAR* GetDefaultGraphName() const override
|
|
{
|
|
return FDerivedDataBackend::Get().GetDefaultGraphName();
|
|
}
|
|
|
|
void GetDirectories(TArray<FString>& OutResults) override
|
|
{
|
|
FDerivedDataBackend::Get().GetDirectories(OutResults);
|
|
}
|
|
|
|
virtual IDDCCleanup* GetCleanup() const override
|
|
{
|
|
return FDDCCleanup::Get();
|
|
}
|
|
|
|
virtual TSharedRef<FDerivedDataCacheStatsNode> GatherUsageStats() const override
|
|
{
|
|
return FDerivedDataBackend::Get().GatherUsageStats();
|
|
}
|
|
|
|
/** Get event delegate for data cache notifications */
|
|
virtual FOnDDCNotification& GetDDCNotificationEvent()
|
|
{
|
|
return DDCNotificationEvent;
|
|
}
|
|
|
|
protected:
|
|
uint32 NextHandle()
|
|
{
|
|
return (uint32)CurrentHandle.Increment();
|
|
}
|
|
|
|
|
|
private:
|
|
|
|
/**
|
|
* Internal function to build a cache key out of the plugin name, versions and plugin specific info
|
|
* @param DataDeriver plugin to produce the elements of the cache key.
|
|
* @return Assembled cache key
|
|
**/
|
|
static FString BuildCacheKey(FDerivedDataPluginInterface* DataDeriver)
|
|
{
|
|
FString Result = FDerivedDataCacheInterface::BuildCacheKey(DataDeriver->GetPluginName(), DataDeriver->GetVersionString(), *DataDeriver->GetPluginSpecificCacheKeySuffix());
|
|
return Result;
|
|
}
|
|
|
|
static void ValidateCacheKey(const TCHAR* CacheKey)
|
|
{
|
|
checkf(Algo::AllOf(FStringView(CacheKey), [](TCHAR C) { return FChar::IsAlnum(C) || FChar::IsUnderscore(C) || C == TEXT('$'); }),
|
|
TEXT("Invalid characters in cache key %s. Use SanitizeCacheKey or BuildCacheKey to create valid keys."), CacheKey);
|
|
}
|
|
|
|
/** Counter used to produce unique handles **/
|
|
FThreadSafeCounter CurrentHandle;
|
|
/** Object used for synchronization via a scoped lock **/
|
|
FCriticalSection SynchronizationObject;
|
|
/** Map of handle to pending task **/
|
|
TMap<uint32,FAsyncTask<FBuildAsyncWorker>*> PendingTasks;
|
|
|
|
/** Cache notification delegate */
|
|
FOnDDCNotification DDCNotificationEvent;
|
|
|
|
TUniquePtr<UE::DerivedData::ICache> Cache;
|
|
};
|
|
|
|
static FDerivedDataCacheInterface* GDerivedDataCacheInstance;
|
|
|
|
PRAGMA_DISABLE_DEPRECATION_WARNINGS
|
|
|
|
/**
|
|
* Module for the DDC
|
|
*/
|
|
class FDerivedDataCacheModule final : public IDerivedDataCacheModule
|
|
{
|
|
public:
|
|
virtual FDerivedDataCacheInterface& GetDDC() final
|
|
{
|
|
return **CreateOrGetDDC();
|
|
}
|
|
|
|
virtual FDerivedDataCacheInterface* const* CreateOrGetDDC() final
|
|
{
|
|
FScopeLock Lock(&CreateLock);
|
|
if (!GDerivedDataCacheInstance)
|
|
{
|
|
GDerivedDataCacheInstance = new FDerivedDataCache();
|
|
check(GDerivedDataCacheInstance);
|
|
}
|
|
return &GDerivedDataCacheInstance;
|
|
}
|
|
|
|
virtual void ShutdownModule() final
|
|
{
|
|
FDDCCleanup::Shutdown();
|
|
|
|
delete GDerivedDataCacheInstance;
|
|
GDerivedDataCacheInstance = nullptr;
|
|
}
|
|
|
|
private:
|
|
FCriticalSection CreateLock;
|
|
};
|
|
|
|
PRAGMA_ENABLE_DEPRECATION_WARNINGS
|
|
|
|
IMPLEMENT_MODULE(FDerivedDataCacheModule, DerivedDataCache);
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
namespace UE
|
|
{
|
|
namespace DerivedData
|
|
{
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
class FCache final : public ICache
|
|
{
|
|
public:
|
|
virtual ~FCache() = default;
|
|
|
|
virtual FCacheBucket CreateBucket(FStringView Name) final { return Private::CreateCacheBucket(Name); }
|
|
|
|
virtual FCacheRecordBuilder CreateRecord(const FCacheKey& Key) final { return Private::CreateCacheRecordBuilder(Key); }
|
|
|
|
virtual FRequest Put(
|
|
TArrayView<FCacheRecord> Records,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCachePutComplete&& Callback) final;
|
|
|
|
virtual FRequest Get(
|
|
TConstArrayView<FCacheKey> Keys,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCacheGetComplete&& Callback) final;
|
|
|
|
virtual FRequest GetPayload(
|
|
TConstArrayView<FCachePayloadKey> Keys,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCacheGetPayloadComplete&& Callback) final;
|
|
|
|
virtual void CancelAll() final;
|
|
|
|
private:
|
|
void Put(
|
|
FCacheRecord Record,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCachePutComplete& Callback);
|
|
|
|
void Get(
|
|
const FCacheKey& Key,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCacheGetComplete& Callback);
|
|
|
|
void GetPayload(
|
|
const FCachePayloadKey& Key,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCacheGetPayloadComplete& Callback);
|
|
|
|
static FString MakeRecordKey(const FCacheKey& Key)
|
|
{
|
|
check(Key.Bucket.IsValid() && !Key.Hash.IsZero());
|
|
TStringBuilder<96> Out;
|
|
Out << Key.Bucket << TEXT("_") << Key.Hash;
|
|
return FDerivedDataCacheInterface::SanitizeCacheKey(Out.ToString());
|
|
}
|
|
|
|
static FString MakePayloadKey(const FCachePayloadKey& PayloadKey)
|
|
{
|
|
check(PayloadKey.CacheKey.Bucket.IsValid() && !PayloadKey.CacheKey.Hash.IsZero() && PayloadKey.Id.IsValid());
|
|
TStringBuilder<96> Out;
|
|
Out << PayloadKey.CacheKey.Bucket << TEXT("_") << PayloadKey.CacheKey.Hash << TEXT("_") << PayloadKey.Id;
|
|
return FDerivedDataCacheInterface::SanitizeCacheKey(Out.ToString());
|
|
}
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void FCache::Put(
|
|
FCacheRecord Record,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCachePutComplete& Callback)
|
|
{
|
|
const FCacheKey& Key = Record.GetKey();
|
|
EStatus Status = EStatus::Error;
|
|
|
|
ON_SCOPE_EXIT
|
|
{
|
|
if (Callback)
|
|
{
|
|
Callback(FCachePutCompleteParams{Key, Status});
|
|
}
|
|
};
|
|
|
|
if (!EnumHasAnyFlags(Policy, ECachePolicy::Store))
|
|
{
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("Cache: Put skipped for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
return;
|
|
}
|
|
|
|
const auto PutPayload = [&Key, Context](const FPayload& Payload)
|
|
{
|
|
const FSharedBuffer Buffer = Payload.GetBuffer().GetCompressed().Flatten();
|
|
check(Buffer && Buffer.GetSize() <= MAX_int32);
|
|
TConstArrayView<uint8> BufferView = MakeArrayView(
|
|
static_cast<const uint8*>(Buffer.GetData()),
|
|
static_cast<int32>(Buffer.GetSize()));
|
|
GetDerivedDataCacheRef().Put(*MakePayloadKey(FCachePayloadKey{Key, Payload.GetId()}), BufferView, Context);
|
|
};
|
|
|
|
FCbWriter Writer;
|
|
Writer.BeginObject();
|
|
{
|
|
if (const FPayload& Value = Record.GetValuePayload())
|
|
{
|
|
PutPayload(Value);
|
|
Writer.BeginObject("Value"_ASV);
|
|
Writer.AddObjectId("Id"_ASV, FCbObjectId(Value.GetId().GetView()));
|
|
Writer.AddBinaryAttachment("Hash"_ASV, Value.GetHash());
|
|
Writer.EndObject();
|
|
}
|
|
if (!Record.GetAttachmentPayloads().IsEmpty())
|
|
{
|
|
Writer.BeginArray("Attachments"_ASV);
|
|
for (const FPayload& Attachment : Record.GetAttachmentPayloads())
|
|
{
|
|
PutPayload(Attachment);
|
|
Writer.BeginObject();
|
|
Writer.AddObjectId("Id"_ASV, FCbObjectId(Attachment.GetId().GetView()));
|
|
Writer.AddBinaryAttachment("Hash"_ASV, Attachment.GetHash());
|
|
Writer.EndObject();
|
|
}
|
|
Writer.EndArray();
|
|
}
|
|
|
|
const FCbObject& Meta = Record.GetMeta();
|
|
if (Meta.CreateViewIterator())
|
|
{
|
|
Writer.AddObject("Meta"_ASV, Meta);
|
|
}
|
|
}
|
|
Writer.EndObject();
|
|
|
|
TArray<uint8> Data;
|
|
const uint64 SaveSize = Writer.GetSaveSize();
|
|
check(SaveSize <= MAX_int32);
|
|
Data.SetNumUninitialized(static_cast<int32>(SaveSize));
|
|
Writer.Save(MakeMemoryView(Data));
|
|
|
|
GetDerivedDataCacheRef().Put(*MakeRecordKey(Key), Data, Context);
|
|
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("Cache: Put for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
Status = EStatus::Ok;
|
|
}
|
|
|
|
FRequest FCache::Put(
|
|
TArrayView<FCacheRecord> Records,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCachePutComplete&& Callback)
|
|
{
|
|
for (FCacheRecord& Record : Records)
|
|
{
|
|
Put(MoveTemp(Record), Context, Policy, Priority, Callback);
|
|
}
|
|
return FRequest();
|
|
}
|
|
|
|
void FCache::Get(
|
|
const FCacheKey& Key,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCacheGetComplete& Callback)
|
|
{
|
|
FPayload Value;
|
|
TArray<FPayload> Attachments;
|
|
TArray<FPayloadId, TInlineAllocator<1>> SkippedPayloads;
|
|
FCacheRecordBuilder RecordBuilder = CreateRecord(Key);
|
|
EStatus Status = EStatus::Error;
|
|
|
|
ON_SCOPE_EXIT
|
|
{
|
|
if (Callback)
|
|
{
|
|
Callback(FCacheGetCompleteParams{RecordBuilder.Build(), Status});
|
|
}
|
|
};
|
|
|
|
// Skip the request if querying the cache is disabled.
|
|
if (!EnumHasAnyFlags(Policy, ECachePolicy::Query))
|
|
{
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("Cache: Get skipped for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
return;
|
|
}
|
|
|
|
// Request the record from storage.
|
|
FSharedBuffer RecordBuffer;
|
|
{
|
|
TArray<uint8> RecordData;
|
|
if (!GetDerivedDataCacheRef().GetSynchronous(*MakeRecordKey(Key), RecordData, Context))
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: Get cache miss for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
return;
|
|
}
|
|
RecordBuffer = MakeSharedBufferFromArray(MoveTemp(RecordData));
|
|
}
|
|
|
|
// Validate that the record can be read as compact binary without crashing.
|
|
if (ValidateCompactBinaryRange(RecordBuffer, ECbValidateMode::Default) != ECbValidateError::None)
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: Get cache miss with corrupted record for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
return;
|
|
}
|
|
|
|
// Read the record from its compact binary fields.
|
|
const FCbObject RecordObject(MoveTemp(RecordBuffer));
|
|
FCbObject MetaObject = RecordObject.Find("Meta"_ASV).AsObject();
|
|
const FCbObjectView ValueObject = RecordObject["Value"_ASV].AsObjectView();
|
|
const FCbArrayView AttachmentsArray = RecordObject["Attachments"_ASV].AsArrayView();
|
|
|
|
// Read the value and attachments if they have been requested.
|
|
const auto GetPayload = [&SkippedPayloads, &Key, Policy, Context](FCbObjectView PayloadObject, ECachePolicy SkipFlag) -> FPayload
|
|
{
|
|
TArray<uint8> PayloadData;
|
|
const FPayloadId PayloadId = FPayloadId(PayloadObject["Id"_ASV].AsObjectId().GetView());
|
|
const FIoHash PayloadHash = PayloadObject["Hash"_ASV].AsBinaryAttachment();
|
|
const FCachePayloadKey PayloadKey{Key, PayloadId};
|
|
if (EnumHasAnyFlags(Policy, SkipFlag))
|
|
{
|
|
SkippedPayloads.Add(PayloadId);
|
|
return FPayload(PayloadId, PayloadHash);
|
|
}
|
|
else if (GetDerivedDataCacheRef().GetSynchronous(*MakePayloadKey(PayloadKey), PayloadData, Context))
|
|
{
|
|
if (FIoHash::HashBuffer(MakeMemoryView(PayloadData)) == PayloadHash)
|
|
{
|
|
return FPayload(PayloadId, PayloadHash, FCompressedBuffer::FromCompressed(MakeSharedBufferFromArray(MoveTemp(PayloadData))));
|
|
}
|
|
else
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: Get cache miss with corrupted content for %s from '%.*s'"),
|
|
*WriteToString<96>(PayloadKey), Context.Len(), Context.GetData());
|
|
return FPayload();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: Get cache miss with missing content for %s from '%.*s'"),
|
|
*WriteToString<96>(PayloadKey), Context.Len(), Context.GetData());
|
|
return FPayload();
|
|
}
|
|
};
|
|
|
|
if (ValueObject.CreateViewIterator() && !(Value = GetPayload(ValueObject, ECachePolicy::SkipValue)))
|
|
{
|
|
return;
|
|
}
|
|
|
|
Attachments.Reserve(AttachmentsArray.Num());
|
|
for (FCbFieldView AttachmentField : AttachmentsArray)
|
|
{
|
|
Attachments.Add(GetPayload(AttachmentField.AsObjectView(), ECachePolicy::SkipAttachments));
|
|
if (!Attachments.Last())
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Check for existence of the value and attachments if they were skipped.
|
|
if (!SkippedPayloads.IsEmpty())
|
|
{
|
|
TArray<FString, TInlineAllocator<1>> SkippedPayloadKeys;
|
|
SkippedPayloadKeys.Reserve(SkippedPayloads.Num());
|
|
Algo::Transform(SkippedPayloads, SkippedPayloadKeys,
|
|
[&Key](const FPayloadId& Id) -> FString { return MakePayloadKey(FCachePayloadKey{Key, Id}); });
|
|
const bool bPayloadsExist = EnumHasAnyFlags(Policy, ECachePolicy::StoreLocal)
|
|
? GetDerivedDataCacheRef().TryToPrefetch(SkippedPayloadKeys, Context)
|
|
: GetDerivedDataCacheRef().AllCachedDataProbablyExists(SkippedPayloadKeys);
|
|
if (!bPayloadsExist)
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: Get cache miss with missing content for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Populate the builder now that any error conditions have been handled.
|
|
if (!EnumHasAnyFlags(Policy, ECachePolicy::SkipMeta) && MetaObject.CreateViewIterator())
|
|
{
|
|
RecordBuilder.SetMeta(MoveTemp(MetaObject));
|
|
}
|
|
if (Value)
|
|
{
|
|
RecordBuilder.SetValue(MoveTemp(Value));
|
|
}
|
|
for (FPayload& Attachment : Attachments)
|
|
{
|
|
RecordBuilder.AddAttachment(MoveTemp(Attachment));
|
|
}
|
|
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: Get cache hit for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
Status = EStatus::Ok;
|
|
}
|
|
|
|
FRequest FCache::Get(
|
|
TConstArrayView<FCacheKey> Keys,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCacheGetComplete&& Callback)
|
|
{
|
|
for (const FCacheKey& Key : Keys)
|
|
{
|
|
Get(Key, Context, Policy, Priority, Callback);
|
|
}
|
|
return FRequest();
|
|
}
|
|
|
|
void FCache::GetPayload(
|
|
const FCachePayloadKey& Key,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCacheGetPayloadComplete& Callback)
|
|
{
|
|
FPayload Payload(Key.Id, FIoHash());
|
|
EStatus Status = EStatus::Error;
|
|
|
|
ON_SCOPE_EXIT
|
|
{
|
|
if (Callback)
|
|
{
|
|
Callback(FCacheGetPayloadCompleteParams{Key.CacheKey, MoveTemp(Payload), Status});
|
|
}
|
|
};
|
|
|
|
// Skip the request if querying the cache is disabled.
|
|
if (!EnumHasAnyFlags(Policy, ECachePolicy::Query))
|
|
{
|
|
UE_LOG(LogDerivedDataCache, VeryVerbose, TEXT("Cache: GetPayload skipped %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
return;
|
|
}
|
|
|
|
// Check for existence of the payload if it is being skipped.
|
|
if (EnumHasAnyFlags(Policy, ECachePolicy::SkipValue))
|
|
{
|
|
const bool bPayloadExists = EnumHasAnyFlags(Policy, ECachePolicy::StoreLocal)
|
|
? GetDerivedDataCacheRef().TryToPrefetch({MakePayloadKey(Key)}, Context)
|
|
: GetDerivedDataCacheRef().CachedDataProbablyExists(*MakePayloadKey(Key));
|
|
if (bPayloadExists)
|
|
{
|
|
// Request the record from storage.
|
|
FSharedBuffer RecordBuffer;
|
|
{
|
|
TArray<uint8> RecordData;
|
|
if (!GetDerivedDataCacheRef().GetSynchronous(*MakeRecordKey(Key.CacheKey), RecordData, Context))
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: Get cache miss with missing record for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
return;
|
|
}
|
|
RecordBuffer = MakeSharedBufferFromArray(MoveTemp(RecordData));
|
|
}
|
|
|
|
// Validate that the record can be read as compact binary without crashing.
|
|
if (ValidateCompactBinaryRange(RecordBuffer, ECbValidateMode::Default) != ECbValidateError::None)
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: Get cache miss with corrupted record for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
return;
|
|
}
|
|
|
|
// Read the record from its compact binary fields.
|
|
const FCbObject RecordObject(MoveTemp(RecordBuffer));
|
|
const FCbObjectView ValueObject = RecordObject["Value"_ASV].AsObjectView();
|
|
const FCbArrayView AttachmentsArray = RecordObject["Attachments"_ASV].AsArrayView();
|
|
|
|
// Find the hash of the payload in the record.
|
|
const FCbObjectId KeyObjectId(Key.Id.GetView());
|
|
if (ValueObject["Id"_ASV].AsObjectId() == KeyObjectId)
|
|
{
|
|
Payload = FPayload(Key.Id, ValueObject["Hash"_ASV].AsBinaryAttachment());
|
|
}
|
|
else
|
|
{
|
|
for (FCbFieldView AttachmentField : AttachmentsArray)
|
|
{
|
|
if (AttachmentField.AsObjectView()["Id"_ASV].AsObjectId() == KeyObjectId)
|
|
{
|
|
Payload = FPayload(Key.Id, AttachmentField.AsObjectView()["Hash"_ASV].AsBinaryAttachment());
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Payload)
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: GetPayload (exists) cache hit for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
Status = EStatus::Ok;
|
|
}
|
|
else
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose,
|
|
TEXT("Cache: GetPayload (exists) cache miss with missing payload in record for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: GetPayload (exists) cache miss for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Request the payload from storage.
|
|
TArray<uint8> Data;
|
|
if (!GetDerivedDataCacheRef().GetSynchronous(*MakePayloadKey(Key), Data, Context))
|
|
{
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: GetPayload cache miss for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
return;
|
|
}
|
|
|
|
Payload = FPayload(Key.Id, FCompressedBuffer::FromCompressed(MakeSharedBufferFromArray(MoveTemp(Data))));
|
|
|
|
UE_LOG(LogDerivedDataCache, Verbose, TEXT("Cache: GetPayload cache hit for %s from '%.*s'"),
|
|
*WriteToString<96>(Key), Context.Len(), Context.GetData());
|
|
Status = EStatus::Ok;
|
|
}
|
|
|
|
FRequest FCache::GetPayload(
|
|
TConstArrayView<FCachePayloadKey> Keys,
|
|
FStringView Context,
|
|
ECachePolicy Policy,
|
|
EPriority Priority,
|
|
FOnCacheGetPayloadComplete&& Callback)
|
|
{
|
|
for (const FCachePayloadKey& Key : Keys)
|
|
{
|
|
GetPayload(Key, Context, Policy, Priority, Callback);
|
|
}
|
|
return FRequest();
|
|
}
|
|
|
|
void FCache::CancelAll()
|
|
{
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
ICache* CreateCache()
|
|
{
|
|
return new FCache();
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
} // DerivedData
|
|
} // UE
|